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Configuring Cisco MC3810 Series Concentrators to Use High-Performance Compression Modules
codec complexity
To match the DSP complexity packaging to the codec(s) to be supported, enter the codec complexity
voice-card configuration command. The no form of the command restores the default value.
high
Syntax Description
medium
Defaults
The DSP supports medium complexity codecs.
Command Modes
Voice-card configuration
Release
Command History
12.0(5)XK
12.0(7)T
12.0(7)XK
12.1(2)T
Usage Guidelines
Select a higher codec complexity if that is required in order to support a particular codec or combination
of codecs.
Select a lower codec complexity to support the greatest number of voice channels, provided that the
lower complexity is compatible with the particular codecs in use.
To change codec complexity, all of the DSP voice channels must be in the idle state.
Codec complexity refers to the amount of processing required to perform voice compression. Codec
complexity affects the call density—the number of calls that can take place on the digital signal
processors (DSPs). With higher codec complexity, fewer calls can be handled.
Note
In the Cisco MC3810 series, this command is valid only with HCM(s) installed, and you
must specify voice card 0 in the command mode. If two HCMs are installed, the codec
complexity command configures both HCMs at once.
codec complexity {high | medium}
no codec complexity
With high complexity packaging, each DSP supports two voice channels encoded in any
of the following formats: G.711ulaw, G.711alaw, G.723.1(r5.3),
G.723.1 Annex A(r5.3), G.723.1(r6.3), G.723.1 Annex A(r6.3), G.726(r16),
G.726(r24), G.726(r32), G.729, G.729 Annex B, G.728, and fax relay.
With medium complexity packaging, each DSP supports four voice channels encoded in
any of the following formats: G.711ulaw, G.711alaw, G.726(r16), G.726(r24),
G.726(r32), G.729 Annex A, G.729 Annex B with Annex A, and fax relay. This is the
default.
Modification
The command was introduced for the Cisco 2600 and 3600 series.
This command was implemented in the 12.0(7)T release.
This command was first supported on the Cisco MC3810 series for use
with the high performance compression module (HCM).
This command was implemented in the 12.1(2)T release.
codec complexity
Cisco IOS Release 12.1(2)T
11
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